scoped-test failed on main after "Upgrade otel core (#37279)"

[pjanotti]

Component(s)

No response

Describe the issue you're reporting

The run for scoped-test failed on main after #37279 was merged

https://github.com/open-telemetry/opentelemetry-collector-contrib/actions/runs/12825992450/job/35765108783

Checking for affected tests...
/usr/bin/bash: -c: line 6: unexpected EOF while looking for matching `)'
make: *** [Makefile.Common:292: run-changed-tests] Error 2
Error: Process completed with exit code 1.

[pjanotti]

This is similar to the issue reported at https://cloud-native.slack.com/archives/C07CCCMRXBK/p1736476919222099. It seems that when the number of changed files is large enough it ends up generating a truncated bash script to be run. This may requires that the list of files to be passed as a file instead of a variable. 🤔

EDIT: ah, the way that it is right now it is expanding the variable at the bash statement, so it generates a very large single line bash expression.

[pjanotti]

Besides the improvement above the GitHub action itself could check the number of affected components and above a certain threshold just add the Run Windows label and bail out since the concurrent execution leveraging the groups will likely be faster.